Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34cafe89f88f761c0fad8c1d74462cda55a06d3d20cce49c48f2764c91c3efae' 
  AND token = 'joRgUr39iKToSYI5aEhiZC9BgQhf2vCza+RD2XXXM78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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