Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41cc615042619f5756f251732b698ac2a14800a1ed4e141d75da372e9789399d' 
  AND token = 'DXL9MJdqie8K+gE9fD95rrb4S2z1SbHl8vSr9+eKvKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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