Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e28b9e05b6b69d4cf3d4b06455ab0dcaf5c8702ce00b979bed0ed0a1c74d062' 
  AND token = 'c4Zfzf4iS86u7KSmZhxo3VqHRywkaWUsxPWu01hwHSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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