Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ece8f5014e47f06577911461085adc3170c4fefd03d17e34001ed2e49a5cb73' 
  AND token = 'YEtDn5hG8iPAI7yanp/FBb8WkFLFEYTlgJvRqpt/1EE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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