Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c1d17cae7a2b75aef25e366ab9adfa78bc116bb2c48fe7cbd08d6337fe2eb11' 
  AND token = 'qBweeQ1iFS3S8ZPHml72zneOFAcFKrYfgEX9D6uJdtU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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