Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9b2770d30d23950379a357b314bbc3cff80107b8ce1ccdce773c9379a9c3b44e' 
  AND token = 'ruLIgOUQM51rXA88345EZZw2uBm2vnRCc07pnCj2Ejc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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