SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4de224e01830b5abf189d4156d7f73b2f90ef7ee397f9e1f0577c893263f8d9e' 
  AND token = '7jRHy1vlvR8YUJPpBQ2F9Ig8Bcwih6FhDKrokK5VfgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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