Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '118fef5dcce233c8a457bde02f08e807f2830ec90743d8a97c39ae9122fafaef' 
  AND token = 'Ai3Qm5+yUyKFy0Y8nesb/Sfc4CLLbRSYGrQ/YReQBU8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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