Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a0e58a03ddb5f44ef1ece6245ccd07d4466fc6621f66960f4293284e81463f6' 
  AND token = '35LJN3AbSSIMhC2fCg0AlPeTDiZEvrCsb2hvNNztFCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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