Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f75119e850baded1efa990faf905981716b3fabfb02adf606f5680ab6367f0c' 
  AND token = 'tHqxOlSGDBYFOPpQXOq4FpAEMMo06dOKbJ0cgqPv2R4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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