Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffc895fb96a392b0ef819fdf6905ebc5d61b44ff5b99dcc43c57be6814226a5e' 
  AND token = 'wYCLgDbDAp+VQk/JmPWdqMpVDpLuVAAYOo9y4t5hCc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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