Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b4c893fc34583be61e1e96448078a3038c79cbc8fd2073c527f0fdd7f61c251b' 
  AND token = 'AboKlJI/M8/6NK+trPR7QBnelH1kTY5Piu9tXW9auaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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