Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ed5e397bf5b1b70bdcb31c38b965cae0f1b26f6606533a1dde9f4ae9e3cbcac' 
  AND token = 'pkOFpcBvhvsPAvdnZgD81aVD7e8L7HEZnlbmuOqNtYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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