Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a433bf6ecb21b05f6ba9dfd5e3d3c89d6cea965d615e78de8ff672761776184' 
  AND token = 'KZ07EsATB64Fv0gJ9kpPvir2ykV+rKn0rBLD0rsHmKw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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