Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57d5a5d8fb327919a8bb1043f10493427309dea050c7b89032eb41dca8069aea' 
  AND token = '+7bwM8/qgS13Fwsd1aftiWBQt3KLf7Oo6UcRDvvjbP8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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