Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db9072acd2774517610ba4c4dda254b2c2bf3b9a68e025921cedb16ca9809283' 
  AND token = 'dIqyyK3EcWeDjnDOZ3rtCi2ch7mHADR8LylkWzkRiRs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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