Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58186eedc8dbb26befa9d491ac079a72fad4df14dd83e42769dd98e524b7cce7' 
  AND token = 'R/KU9QfSaPlT/rU6WjKnDvnIHWCOMpCcWBVQlA+XNyw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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