Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b919d4744184bf4e8f9ea90b1c722247e28b55f4835c37afb48a43e9ddb666f2' 
  AND token = 'KJ9FXwgCwIRNg1EBhMN2V3OQg3dqNOubho6ExgSphik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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