Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccfa296978f2d07fea723c21893c38d8015dbaae582a0f71dfd8710e7864a870' 
  AND token = 'WSm/afUbWkHA/GLPEkI0S2j8/KSdpxJ/kvDJ0JU904Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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