Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0410a476668efaa67a267c48ab8b4b4032b05e4206d26a0b3e9ccff52fb3b36b' 
  AND token = '773/UsYebS5/W4CFR2V8TLNsYbQ8NBkUCH/uA2UyL2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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