Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2f239a1eaa7cf983e8790a4200e978c457961918f3cb59448ae1b60cb917fb1' 
  AND token = 'J1+qjvZAU3NTpO4TEYUQrkEiqagHPphaUQwuXHScRH4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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