Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd49b33d62d878fcc9a9c13ea52f4203cbb422b17463866ed595374db676bca00' 
  AND token = 'c0SusA1xQC/MjfiOtmjZmnQiB3TE8kh0t0EbA7zfcow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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