Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '738ed88f04d06aadf813017177f3aa3d98fc39dbe1a241da96f6e6e190562170' 
  AND token = '+z1gnX1fEBr161xnk3xmUQ78tSNUuBXl9BnRJ6HBlCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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