Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e044e5656edbe5283d90294eed4de96cd3ed507788f8067cf5c2da380db8afbc' 
  AND token = 'CxM7xWdOkLzCwLA62yG5UMTChP/IS2kWQhIVUG/NRQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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