SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a180ed2ad55a00d85397e615af36d3564c32e1476c21812ff09d76292bfe4388' 
  AND token = 'qONpzTLUGiPXo9spAIs2YRdNiVYiDy0SwsZ8RuQyVgM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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