Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0831b60cb8410eebb25fa41870af9e843bec04b5c79d2f9e7c0be18676b2d9f4' 
  AND token = 'KGE8wGTYzIJgM95nWGI47PFu4qdB6FWrGCTl0Bww7lQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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