Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e07c41052b0c0982e8489bb0a35b3df9e6ce802a760effe7c9ee2920eab9fdd5' 
  AND token = 'TdQb+SX9vO71196iVwUTiblcYQwtG70kivhSACS5mZw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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