Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e6f312756641e3e40401d4c54881eedafb800c923d0a0982dc568e9e32d9086' 
  AND token = '6UEfYoIt8QU7DWA4hUzyH9zB4WQL+Ma/P7rgvGH6xTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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