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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffb4cf21837c44c55157bb887bf9ca62601095a27fc7d950ea29191ce5c936ce' 
  AND token = 'JA4pRiaPw70Q0aNTlasTjY62StLR73NDJBDoI8GZ8eE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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