SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2320aa1714fd3d03b34899ff65c131ab33bdf22fa79965471d24a09b88398781' 
  AND token = 'qMLI+RY0cdS+PHpVlgoiVUJpDSqNZAqj8ZHq+3vrAAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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