Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '706a34bc3a5a33de2c2ccba6efac67aa5a924b0617875b33c85490f384c78ce9' 
  AND token = 'YqlovrVGCytgEvDFBaeIZ5KvkOewci0adW8jnXqODBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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