Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaa58ba5a73adbe3b0653f9fea8f2748c7524f0b3f86632dca15b9dec286034c' 
  AND token = 'U++gmSEEf7aS1To4XRH/36MIPXg8bn3/CWYMd0yR9XQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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