Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '123b88c4c2688164d0ea62f8146dd274a1754f327c7fe1424e49470e32ed8143' 
  AND token = 'gDhlZYj0Pzz2EQyaSIbZrX38q9FiYQ3F4BVldkrjz0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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