Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25700effbcfc5b385fe5abc43b3a983829cf0cfce5951ebfffdf8c4c0041f90e' 
  AND token = 'cEfcLaEvkDhQYmpQOf16b83NQLKC+H2Cbf3tQpO3Wz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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