Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ece8d4600fffffe3030ee419c1d1e70d5239af072f03c48b550d4a8697ef1a58' 
  AND token = 'U++8No1ql9aOuL4bVaXdBbKW3mCnm1wBqmFGWmMD+HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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