Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5c4acd4cef3ced716d8c2ff7d8c56326b1de76ffe375229c12fd64d36118055' 
  AND token = 'HeO4tbTq/vGIWvhByC3wJKJUG923pPTcKFop9DD2g2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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