Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18173f29af97f997e92189ef6278f4cd5a3484fe65f8318579c41d2736aeade1' 
  AND token = 'gOpPUpbYyZyIrupIWsXYFoY/dJ0wKDpPi6rU1v7P/M8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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