Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0296edbab3f92361a59594ca04058f0989a514e2869b13c6059ca41e7312375e' 
  AND token = 't4pClHkJcptMbErHkE8zMvC6reKC4R+SXK7fW6bgMA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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