Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41ba2fa6bf93be8438deb22aaa6dbe6411c1ac0bb7bccbe5bb022f3e4f3cf83e' 
  AND token = 'Bb8B2tERz7nHHOAy0dqmoEk83qDZ/DvqZMjfSCxPBpQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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