Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6e2e60b3f05c3592dcb443f59c37484bd919f67ba8211b28e00aab54c7961706' 
  AND token = '70oq4vo2Cl6wjtFupFVmQ12t11gAo29h1jkDnBiAVfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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