Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc188ca7789e95d39a003182b1d645963d216402ad63a2ee573de4028bc8e46d' 
  AND token = 'zilb31pfCFP3ji89bFICNtYs93/wPB0yvjyVcon5CAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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