Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb996a600ebecabe9a53f00fde625fd4106db5fbff6134d4ea6fae68f06752f' 
  AND token = 'PvECR4euCovQJwFuDqwfFgucoJ8PNx5rg1CqsVrpkDY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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