Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1295ecb3d1774823770698d222c2ccddf7fb5da43c227567c39b12bc790b4d45' 
  AND token = 'thH4yDySffLDDibKmx8LCuxaI1V7bi4uNwRpm5JUxVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}