Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3be8711f07ed06cf4e3f9ab06d549287857512d863e4e882dd1e546fcd96dbcd' 
  AND token = 'YlRdnfG3ygDe8pegfGcwp1Czg6CCktP2F2Ol7pCHLD0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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