Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4549b4e0f6cd40514d97228ecaa463bff4cc365d5da1bef8cbb9f01d6d05e2d6' 
  AND token = 'OqH+H/R5oF1HwL7FNCn5S8bTDZVTk1WepLrJDPt3Qk4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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