Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2279d2813c07189be2f792c620c5686e8cde341d8f95c2e1b65991e05088db9f' 
  AND token = 'GpcXnwYhRfmZ8onMUbyVYIfeCCrqlJwXQoRNxZlgP7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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