Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '18e2688dbb389e1342fbebccdb1a926cba5c88d5f179a1629b90d29af3484e45' 
  AND token = 'gut9OEmYnJEao5H8rfUs7A/Kri03FMuyNfyNnPvZAn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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