Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e34086503d102171df867ff8250e34d8e92eb8c091df744a3d5687d686c59e07' 
  AND token = 'HP3vIXd178qBLduWcsc5+3dVqRoW5SOJ3dAFqf3239M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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