Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a4e1e3e1186b6de999181ea4044af89feea085d5cf998ae563e2c5002097c31' 
  AND token = 'Y+xsqI3N9+1XYWCFOkx5LrFxqxgoaa/7oOKXRhBvroo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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