Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9147edba13ceb8223939624081447b76d2da3f7bf1b59bdace44709735dd09bc' 
  AND token = 'P4Q23Tr/2DQVhdZg0BotzwZWMloJY6OU7iSOYaJglbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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