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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '380bf6bb420ca04aae181e570a33159b5506e20b88ac93dcb3e9aab74c25ea6f' 
  AND token = 'uXGRpVNlAOt5vNWfuqYbUr3dxg45yg38J6VhU/TGa6w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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