Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86966c6fdcb6a8321369c1cabec549774bfd0301ee86afe64fdfdf16101778d0' 
  AND token = 'dDo1C4vLS0G6Pq/GhwHOigCW3MRMI0wKZdzYSo7YT+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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