Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c614f198332211e3360cbd1b455c2cfc82379dbed898f8c50fbc4126bf1c10bf' 
  AND token = '1MBHR7b7kiSJc8n2cIT+SUbJqJfkNR9FUBrFG6ZGcX4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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