SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bb8af7132871352a667e2c6405958b3b20d8e8fe5de5a91df8adb47a100ef784' 
  AND token = 'wz/qrp81Zn935HX7bk7ogT6mbV9aFKLsHyHNC0HGgzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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