Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd027e9081a226c81db9c9deaac7b1022d3e1ce7a521613c18148837fe8ac4911' 
  AND token = 'sO78shVaWR0c5HANkhPX7UTSDLkLS9OABJAflIrG7x0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}