Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a02106239b8e8711b595b2ec13f2e4a58fe33aa92189ff2827c972f2bec2b40e' 
  AND token = 'dqIDLr+bZzlCBMEtRI1xrCNKGhLOIpEXhaHrP5TUDK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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