Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec9b4615679fd24f14612893be0fec9441e396ced503a6f56bb3c8a8445d6b0c' 
  AND token = '/+eL6QqxtWZ17T1od2i8+2DnSK79kpKaW2vVR8MF+L0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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