Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '673ec37c2f7b16be5985526aad88b1e862b41ec88875d3328c759b72c71bc87d' 
  AND token = 'YHWJXA+H+MVcRWhxXp2akNhFnNQNQfgi49M0vyXwCog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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