Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb056351efe9117f09c75cb9ddbcbc73abf4906ea09007bc3a336af878db56b1' 
  AND token = 'QpSx2vZbVCG5VcRWBjYEbm2ncS/INypZAHhN/17HV9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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