Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bed7ca758a3b46b472bdb231c6bb2efc48fae50107cd84e3708b11dff3f7f72d' 
  AND token = 'sq5aEcsW5stMZEDIA48NEACjLtyK7fEM8l0XbyCJIr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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