Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2aa873655ae1206b513a88311aa804486a2d119958385d6dd58a03cc2efa50b5' 
  AND token = '+bN6BWJQPg2JQY46KP6oy+thsWALWHXc5ts0l9pmlRw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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