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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc48148f5fa3954ea203045f3c3fc6a6a691708fa924e6a1fb34c94f53415ce5' 
  AND token = '9V+t6gWeXRYMDNafk7CWUZAkpeYCyya1YTuS5iJ29hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}