Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b1c799ff915a3ec8fe7201f28f2513bea09b4fda14aacef1be2fc5e3f3cc5c1' 
  AND token = 'LZhlyKQvaO2nNgyR2tqvHs+jkYUNy8TS9n4VtZL4gm0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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