Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaf97df4db9198229b9647bcd47f022457709e848d515e69fa1a6f97077137e3' 
  AND token = 'YEspRDZV9CTFD0i9192mp5rvQTEgrDQ9pPZ4os3vxC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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