Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e389445527ef56b3cf9b734ad3041a7de2305d907cf3b23c68e5c8d93577876b' 
  AND token = 'GKErYnFytyzyKw4wObMygk5qEeVOZE14IKlzzXckALM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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