Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4aff157c34d6cdfa61e79ef969df90b2d76d5a56afd46d82f8ddb8200e5129b' 
  AND token = 'PfqMmgosWYtbHll5jPynY3iN17hHkc4x74160WbThso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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