SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '70481d2c6169ca326718fb95126ad442a54392d33abff04fa85928d6f5b3ed4f' 
  AND token = 'W+/IMjMNCF9BqchLDaUdJbkyrQ07z2IU5VpscnQbwn0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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