SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '02206454b0ddfe5eee5a1e0e3587f83592d46c676acc97f8a1b0d78a9c64497c' 
  AND token = 'iA0tsKCHCeYyxzzonFFo+GlxEqZicKpBYv7ZWWKNVRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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